According to the headline of this article, people who drink a lot of water tend to have healthier diets than people who consume other beverages: us_water_drinkers
The article goes on to explain that there is no proof that drinking water is going to turn you into a better eater, only that there is a connection between the two practices.
Despite what the article suggests, I find it rather unlikely that drinking water is going to increase your appetite for healthier foods.
Something tells me they have this backwards. Don’t most people who are trying to be healthy know that it’s important to get most of your fluids from water? Isn’t this simply a case of healthy eaters making water their beverage of choice?